Abstract
The effects of thermal mechanical treatment (TMT: solution-quenching-precipitation- rolling) on the morphology and the amount of the precipitates in an Al-7.81Zn-1.81Mg-1.62Cu alloy plate and the effects of those particles on the microstructures, textures and hardness have been studied. During TMT, MgZn2 particles with nano/submicron scales significantly inhibit the migration of sub- grain/grain boundaries but would not induce particle simulated nucleation (PSN) recrystallization. An appropriate TMT process results in the remarkable diminish of recrystallization and increases Vickers hardness by 15%.
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